When I pulled it up they had zero players that were PR 'A'.
That doesn't mean a guy never was on an 'A' roster. That doesn't mean you aren't allowed to think a guy is an 'A' player.
If you are asking me personally I rate a player based on roster history, what I know about the player, I look at where he hits in the lineup and what position. I don't rate a guy based on being on a team for 2 weeks or something that happened 7 years ago. But thats just me. Maybe you would tag a guy 'A' that sat the bench for an 'A' team, I don't know.